There's absolutely no evidence that large quakes cause other large quakes on the other side of the globe.
There are a lot of claims regarding quakes that really aren't backed up by anything, made by non-scientists.
"There's absolutely no evidence that large quakes cause other large quakes on the other side of the globe."
Agreed. But it stands to reeason that quakes along the same subduction zone can trigger other, bigger quakes along the same zone.
There's also the weird thing that someone pointed out that seismic activity appears to be traveling arounf the Pacific Plate right now. Moving clockwise from the Tasmanian quake a month or so ago to Sumatra and now a volcano in Kamchatka.
Pure coincidence, probably, but fascinating never the less.